Product DescriptionThe Armaspec Gen 3 SMB-H (Sound Mitigation Buffer) Kit includes the key components needed to complete an AR-15 pattern rifle build while upgrading from traditional mil-spec buffer springs and weights. Designed to reduce operating noise and improve the feel of the action, this complete kit combines an SMB-H buffer assembly with essential receiver extension hardware for a streamlined installation.Product Highlights Sound Mitigation Buffer (SMB) design helps reduce spring "twang" and operating noise SMB-H buffer weight of 3.8 oz for AR-15 pattern firearms Complete kit includes buffer, buffer tube (receiver extension), end plate, and castle nut Drop-in upgrade from standard mil-spec spring and buffer setups Ideal for new builds or refreshes of AR-15 lower receiver buffer assembliesSpecs Brand: Armaspec Product Type: Sound Mitigation Buffer Kit (SMB-H), Gen 3 Compatibility: AR-15 pattern firearms Buffer Weight: 3.8 oz Included Components: SMB buffer assembly, buffer tube (receiver extension), end plate, castle nut Manufacturer Part Number: ARM268-H UPC: 810048492732 Country of Manufacture: USADisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.